Vic responded to this question recently and I think it's a fair answer:

Loftus asked me for something that would make me give up Christianity. Because the case for and against Christianity is incurably cumulative, I couldn't say "THIS would be a decisive deal-breaker." But I did want to point out something the skeptic, in my opinion, has not provided, nor has come close to providing, namely, a plausible naturalistic story about the founding of Christianity. If one were to emerge, that could lower the probability of Christianity for me, and, to a far lesser extent, the probability of theism.

There are other books, many others. Just look at the many SBL publications, or Fortress Press, SCM Press, Cambridge Press, Anchor Press.

Readers of DC will probably make some other key suggestions.

What bothers me is that Vic is a specialist. He's a Christian philosopher, and as such he probably rarely steps out of his specialty. He's not a Biblical scholar so the likelihood he's read any of these books is very very slim. And I doubt he'll read them even though I just I pointed them out.